I already posted this on Steam but I copy pasta it here too, since it is recommended in the Steam forum.
Steam forum support request

This month I got an email that informed me, that my "Secret Hitler" mod was "incompatible" for some reason, though it still keeps working just fine for me and others. This is especially weird since many other mods have copied my mod (to be clear, I am not complaining about that) and added on top of it additional content like automation through the integrated lua programming, or additional assets. If their mods are not marked "incompatible" then why is my mod with no coding and less assets marked "incompatible"? It makes absolutely no sense!

Secret Hitler Steam workshop mod link

This is the email I got from Steam:

Dear d1oftwins,

Thank you for your Steam Workshop Contribution Secret Hitler.

Unfortunately, for various reasons, the developers of "Tabletop Simulator" had to flag it as "incompatible", so it cannot be used within "Tabletop Simulator".

You can learn more about what kinds of items are accepted and why certain items are marked as "incompatible" here: http://tabletopsimulator.gamepedia.c...Simulator_Wiki

The Steam Support Team

I'd like to know what is going on with this claim and somehow I doubt the devs have marked it as "incompatible" but rather that was an automated mess of some sort. The link to the wiki page is absolutely unrelated to the specific issue and does not explain anything. I would like a more precise explanation than the link in the email gave me, also I would like to know why my mod is delisted from the workshop search? It might have to do with that my mod was flagged as "incompatible" and therefore unsearchable, if so, it is more of a reason to remove this improper flag!